Construction sealant are mostly synthetic adhesives, whose main body is polymer, and their properties can be divided into three categories: bulk properties, process properties and use properties (product properties).
The functional requirements for sealants in buildings mainly depend on environmental factors: including radiation aging in sunlight, oxidation of oxygen and ozone, erosion of water and water vapor, effects of environmental temperature changes, wind loads, shear forces, and circulation Mechanical (compression/tension) load, invasive air pollution (such as acid rain, salt spray, etc.), the influence of microorganisms and large organisms (fungi, etc.). After understanding the environmental factors, considering the needs of building joints, the functions of building sealants can be summarized as follows: building waterproof, sound insulation, energy saving, corrosion prevention, pollution prevention, fire prevention, decoration, structural elastic connection, structural safety and durability, etc.